/**
 * Copyright 2006 gworks.com.au
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. (http://www.apache.org/licenses/LICENSE-2.0)
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed 
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for 
 * the specific language governing permissions and limitations under the License.
 *
 * <dhamma-message src="Atisha (11th century Tibetan Buddhist master)">
 *  The greatest achievement is selflessness. The greatest worth is self-mastery.
 *  The greatest quality is seeking to serve others. The greatest precept is continual awareness.
 *  The greatest medicine is the emptiness of everything. The greatest action is not conforming with the worlds ways.
 *  The greatest magic is transmuting the passions. The greatest generosity is non-attachment.
 *  The greatest goodness is a peaceful mind. The greatest patience is humility.
 *  The greatest effort is not concerned with results. The greatest meditation is a mind that lets go.
 *  The greatest wisdom is seeing through appearances. 
 * </dhamma-message>
 * 
 * @author Ashin Wimalajeewa (ash)
 */
package org.javaongems.gwk.client;

import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Hyperlink;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.UIObject;
import com.google.gwt.user.client.ui.Widget;

public class LinkBar extends Composite {
  final static public String SEPARATOR = "&nbsp;|&nbsp;";

  private HorizontalPanel container = new HorizontalPanel();
  
  public LinkBar() {
    initWidget(container);
    setStyleName("gwk-LinkBar");
  }
  
  public void addHyperLink(Hyperlink link) {
    addEntry(link);
    UIObject.setStyleName(link.getElement(), "gwk-LinkBar-hl", true);
  }
  
  public void addLabel(Label label) {
    addEntry(label);
  }
  
  private void addEntry(Widget w) {
    if (container.getWidgetCount() != 0) {
      HTML separator = new HTML(SEPARATOR);
      container.add(separator);
    }
    container.add(w);
  }
  
  public void removeLinkOrLabel(Widget w) {
    int pos = container.getWidgetIndex(w);
    if (pos == 0) {
      int count = container.getWidgetCount();
      if (count > 1) 
        container.remove(pos); // removes the following |
      container.remove(pos);   // removes the entry
    } else {
      container.remove(pos-1); // removes the preceeding |
      container.remove(pos);   // removes the entry
    }
  }
  
  public void clear() {
    container.clear();
  }
}